Brand new Common Sense Fastener 20 Piece Set with the Eyelets, Oversized Backing Plates and a Hole Punch for the Eyelets. Also known as “Murphy” fasteners or “Turn Buttons” these fasteners are constructed of nickel plated brass and are designed for fresh and salt water environments. They are marine grade. Questions? Send us an e-mail here on Amazon. We try to answer all questions within 24 hours. Northwest Tarp & Canvas – Bellingham, Washington